package com.imooc.netty;

import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
import io.netty.handler.stream.ChunkedWriteHandler;

public class WSServerInitialzer extends ChannelInitializer<SocketChannel> {
    @Override
    protected void initChannel(SocketChannel ch) throws Exception {
        ChannelPipeline pipeline =ch.pipeline();
//websocket基于http协议,所以要有http编译码器
        pipeline.addLast(new HttpServerCodec());

//对写大数据流的支持
        pipeline.addLast(new ChunkedWriteHandler());
//对httpMessage进行聚合,聚合成FullHttpRequest或FullHttpResponse
        //几乎在netty中的编程,都会用到此handler
        pipeline.addLast(new HttpObjectAggregator(1024*64));

        //======================以上是用于支持http协议==========================
        /*
        websocket 服务器处理的协议,用于指定给客户端连接访问的路由; /ws
        本handler会帮你处理一些繁重的复杂的事
        会帮你处理握手动作: handshaking(close,ping,pong) ping+pong=心跳
        对于websocket来讲,都是以frames进行传输的,不同的数据类型对应的frames也不同
         */
        pipeline.addLast(new WebSocketServerProtocolHandler("/ws"));

        //自定义的handler
pipeline.addLast("ChatHandler",new ChatHandler());

    }
}
